Overdraft-blast for forges.



' J. GEIST. OVERDBAFT BLAST FOB FORGES. 11 2110111011 111.111) rams, 1911.

999,985. I Patented Aug. 8, 1911.

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UNITE STATES PATENT OFFTCE.

JOHN GEIST, OF NASHVILLE, TENNESSEE.

OVERDEAFT-BLAST FOB. FORGES.

Specification of Letters Patent.

Application filed February 25, 1911.

Patented Aug; 8, 1911. Serial No. 610,944.

To aZZwhom it may concern: able supports and is shown as being sup- Be it known that 1, JOHN Gnisr, citizen ported in the chimney 5. The extremity of of the United States, residing at Nashville, the flue 9 is downwardly turned as at 10 in the county of Davidson and State of Tenand is outwardly flared as at 11, the opennessee, have invented certain new and useing of the flue being directed immediately ful Improvements in Overdraft-Blasts for downward toward the fire-pot, the opening Forges, of which the following is a speciof the flue 9 being disposed immediately fication. above the opening of the flue 7 and the My invention relates to forges and parflared or central portion of the flue 10 being ticularly to blacksmith forges. disposed in spaced relation to the walls of In the usual blacksmith forges a draft the chimney 5. The flared'portion 11 is from the bellows or blower is conducted by of course vertically spaced from the top of a flue to a point beneath a fire and constithe forge sufiiciently to permit the introductutes what may be termed an underblast. tion of the work into the forge and permits My invention comprehends the provision the blast of air delivered from the flue 9 of an overblast in addition to the underto spread over the fire in the pot 3. The blast whereby a blast of air may be dicinder-pot 6 is connected to the fire-pot 3 rected downward against the fire so that the by a passage 12 which is preferably slightly air will be concentrated upon the work and to one side of the opening of the flue 7. at a point where the hottest tire is most de The passage of a blast of air through the sired. flues 9 and 7 is controlled by means of A further object of the invention is to dampers or valves 13 and 14. These as provide means whereby the blast of air for illaistrated are slide dampers slidably either the underblast or the overblast may mounted in suitable slots in the walls of be controlled so as to secure the right prothe flues 9 and 7, but it will be obvious that portion of underblast and overblast. any other arrangement of dampers might My invention is illustrated in the accombe used for the purpose of controlling the panying drawings wherein: passage of air through the fines. These Figure 1 is a vertical sectional view dampers 13 and 14 are independent of each through a forge of-an ordinary type and other and thus the blast passing through showing my invention applied thereto. the respective flues 7 and 9 can be. con- Fig. 2 is a sectional view on the line 22 trolled. of Fig. 1 showing the damper. Fig. 3 is The operation of my invention will be a top plan view of the fire pot. obvious. A blast of air will be directed not Corresponding and like parts are referred only upward through the fire-pot by means to in the following description and indiof the blast 7 but a blast of air will be dicated in all the views of the accompanying rected downward on the fire-pot. I have drawings by the same reference characters. found in practice that this construction has Referring to these drawings, 2 designates a number of advantages over the ordinary the base of a forge of any suitable conunder feed. blast. This construction enables struction provided with a fire-pot 3 dethe blacksmith to make up his fire quicker pressed below the top of the forge 4 as is and get a maximum amount of heat much usual in devices of this character. Located quicker than with the ordinary construction. above the fire-pot is the chimney 5 and ex- It is very economical of coal and I have tending downward below the fire-pot is a found in practice that with this construction cinder-pot 6. All these parts are of usual only about half as much fuel need be used construction or desired arrangement. as the draft from the flue 9 keeps the fire Passing into the base of the forge and steady and gets up no wasted or unnecessary delivering at the lower end of the conical heat. fire-pot 3 is the underblast fine 7. This flue With my improved overblast the heat ator pipe extends out from the forge and is tending the work is reduced and the temconnected to any suitable means for creating perature kept down. Thus the workmen do a blast of air, such as a blower 8. not suffer from being overheated. Furthen Branching off from the blower 8 at its more, the overblast in connection with the junction with the flue 7 is an overblast flue underblast enables the blacksmith to heat 9 which at its end is mounted in any suitboth the top and bottom of the work uniformly. Y Vhen the underblast alone is used, the heat is hottest on its under side and the Work has to be turned over to give the other portion sufiicient heat.

It will be obvious that either the overblast or underblast can be cut off Whenever desired and just the proper proportion of overblast may be used with the proper proportion of underblast to secure just the proper degree of heat upon the Work.

What I claim is:

A forge comprising a fire pot, a chimney located over the same, a fixed flue entering the bottom of the fire pot and having its discharge end upwardly disposed, a fixed flue located above the fire pot and having its discharge end downwardly disposed and directly opposite the discharge end of the first mentioned flue the discharge end of the last mentioned flue being spaced from the fire pot and the chimney, and an air blast means operating in common With both fines to send blasts of air through the same, the air passages through both lines being of the same transverse sectional area.

In testimony whereof, I aflix my signature in presence of two Witnesses.

JOHN GEIST. 11. 8.

WVitnesses:

ERNEST C. HARLAN, F. C. SEIBERT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

a Washington, 1). G. 

